CN204705216U - Leakage resistance vapour type shell-and-tube experiment condenser - Google Patents
Leakage resistance vapour type shell-and-tube experiment condenser Download PDFInfo
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- CN204705216U CN204705216U CN201520366905.0U CN201520366905U CN204705216U CN 204705216 U CN204705216 U CN 204705216U CN 201520366905 U CN201520366905 U CN 201520366905U CN 204705216 U CN204705216 U CN 204705216U
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Abstract
The utility model discloses a kind of leakage resistance vapour type shell-and-tube experiment condenser, its structure is: in the left end end socket of condenser, be provided with three layers of dividing plate; Right-hand member is provided with two-layer dividing plate.Second layer dividing plate in left and right end end socket has several liquid-leaking nozzle, and, liquid-leaking nozzle quantity on two endplates is unequal, the aperture area sum of right-hand member dividing plate liquid-leaking nozzle sum is greater than left end.On two endplates, the below of each liquid-leaking nozzle is welded with lime set fairlead, and lime set fairlead is connected in a closed container through housing by insulating tube, and each root lime set is drawn on pipeline and all valve is housed.Liquid-leaking nozzle maintains steam relative velocity and mass dryness fraction in the mode of leakage choke, keeps the higher coefficient of heat transfer with this, and condensing heat-exchange can be made effectively to be strengthened.The Structural design idea of this condenser is the enhanced heat exchange of air cooled condenser, condensing evaporimeter and other in-tube condensation device, provides method for designing and technological approaches.
Description
Technical field
The utility model belongs to Thermal Equipment, is specifically related to a kind of shell-and-tube cooler device with efficient heat transfer effect.
Background technology
Due to the special status of heat exchanger in therrmodynamic system, its heat exchange property is directly with energy-saving and cost-reducing closely related, so numerous factory and scholar spare no effort for many years, the strengthening performance of heat exchanger carries out deep research.Shell-and-tube heat exchanger has the features such as pressure-bearing is high, heat-exchange working medium strong adaptability, still occupies an leading position in the industry such as the energy and petrochemical industry.Caused by heat transfer boundary condition or operating mode, in pipe, the condenser of condensation mode still has certain range of application, and such as carbonated drink condensing heat exchanger mainly concentrates on the shell-and-tube heat exchanger of bellows and bellows tube.This heat exchange mode is in overheated or saturation state at the inducer steam of condenser, and steam quality is shaping without liquid film comparatively greatly, and tube wall is in pearl or the condensation of unstable small stream shape, and now the coefficient of heat transfer is maximum.If air-cooled condenser, then manage outer fin utilization rate and significantly decline.Conventional art all adopts inside and outside area increased to meet heat exchange demand, increases disturbance in pipe as far as possible, causes volume increase, quality increase.Shell-and-tube cooler heat transfer intensification should be considered to restrain and the coordinating of structure, and such as low fin tube was once used widely.
The feature that in-tube condensation shows is, along with the wall that carries out of condensation starts to occur film condensation, and constantly thickens along pipe range direction liquid film, and wall is coagulated by pearl and develops into membranaceous gradually, finally becomes stream-liquid two-phase flow.Because inside pipe wall face film condensation constantly thickens, hinder the contact of steam and wall, become condensation heat transfer dominant thermal resistance place.Along with the carrying out of condensation, liquid film also can constantly increase long-pending thick, and the coefficient of heat transfer reduces.So condenser pipe range is less, liquid film is thinner, and average surface heat transfer coefficient is larger.If but can lime set be discharged in good time, make steam wall maintain pearl or unstable small stream shape heat exchange state, then heat transfer process just can maintain higher convection transfer rate.When condensation wall is covered by liquid film, heat transfer resistance depends primarily on thickness of liquid film, so most of pipeline section of the heat-exchanging tube bundle of shell-and-tube cooler is all in the condensation process of poor efficiency.The utility model proposes based on this and devise a kind of with the horizontal condensing heat exchanger of leakage resistance vapour structure, by the Self-discharged of condensation water, the thickness of liquid film that making condenses in heat transfer process produces reduces, to maintain the flow pattern of the high coefficient of heat transfer.
Summary of the invention
In order to effectively improve the performance of shell-and-tube cooler, the purpose of this utility model proposes a kind of leakage resistance vapour type shell-and-tube cooler experimental provision.
Technical scheme and the principle of this condenser are: leakage hinders vapour type shell-and-tube and tests condenser, and have heat-exchanging tube bundle, housing, dividing plate, deflection plate and end socket, its structure is: in the left end end socket of condenser, be provided with three layers of dividing plate; Two-layer dividing plate is provided with in right-hand member end socket.Wherein the second layer dividing plate in left end end socket and the second layer dividing plate in right-hand member end socket have several liquid-leaking nozzle, and the liquid-leaking nozzle quantity on left and right two endplates is unequal, the aperture area sum of right-hand member dividing plate liquid-leaking nozzle sum is greater than each aperture area sum on left end dividing plate.On left and right two endplates, the below of each liquid-leaking nozzle is welded with lime set fairlead, and lime set fairlead is connected in a closed container by insulating tube through housing.
Its operation principle is: the steam with certain degree of superheat enters three tube banks of the first tube side from condenser left end.Owing to there is higher quality when steam has just entered condenser pipe, there is the higher coefficient of heat transfer, before the first tube side terminates to enter the second tube side, therefore do not have lime set produce, so ground floor dividing plate in right-hand member end socket does not have liquid-leaking nozzle.After but steam is cooled, water cools further, along with inside pipe wall liquid film formation and thicken, likely can produce a small amount of condensate liquid.Therefore, before the outlet of the second tube side enters the 3rd tube side, the second layer dividing plate namely in left end end socket there is no liquid-leaking nozzle (as Fig. 2 Fig. 3).In like manner steam is before the 3rd tube side terminates to enter quadritube-pass, and the second layer dividing plate in right-hand member end socket does not have liquid-leaking nozzle.Because gas-liquid two-phase exists density contrast, liquid phase working fluid is drawn by the liquid-leaking nozzle on dividing plate under gravity.
The beneficial effect of feature of the present utility model and generation is, (1) for the heat exchanger of in-tube condensation, position suitable in condenser pipe has liquid-leaking nozzle, steam relative velocity and mass dryness fraction is maintained in the mode of leakage choke, keep the higher coefficient of heat transfer with this, the heat exchange of this structure condenser can be made effectively to be strengthened.(2) confirm by experiment: the heat exchange efficiency of vapour-liquid separation type condenser in pipe, the traditional condenser under identical heat exchange area, within the identical time period, heat exchange amount can improve 60%.(3) Structural design idea of this condenser is the enhanced heat exchange of air-cooled heat exchanger, condensing evaporimeter and other in-tube condensation device, provides method for designing and technological approaches.
Accompanying drawing explanation
Fig. 1 is shell-and-tube experiment condenser theory structure sketch.
Fig. 2 is Fig. 1 left end structural representation.
Fig. 3 is Fig. 1 right-hand member structural representation.
Detailed description of the invention
Principles and methods of the present utility model to be further described by specific embodiment below in conjunction with accompanying drawing.It should be noted that the present embodiment is narrative, instead of determinate, do not limit protection domain of the present utility model with this embodiment.
Leakage resistance vapour type shell-and-tube experiment condenser, has heat-exchanging tube bundle, housing, dividing plate, deflection plate and end socket etc.Its structure composition is: in the left end end socket 1 of condenser, be provided with three layers of dividing plate 2; Two-layer dividing plate is provided with in right-hand member end socket.Wherein the second layer dividing plate in left end end socket and the second layer dividing plate in right-hand member end socket have several liquid-leaking nozzle 3, and the liquid-leaking nozzle quantity on left and right two endplates is unequal, the aperture area sum of right-hand member dividing plate liquid-leaking nozzle sum is greater than each aperture area sum on left end dividing plate, and on the end socket internal partition of left and right two ends, the aperture of each liquid-leaking nozzle is unequal.
On left and right two endplates, the below of each liquid-leaking nozzle is welded with lime set fairlead, and lime set fairlead is connected in a closed container through housing by insulating tube, and each root lime set of hull outside is drawn on pipeline and all valve is housed.
The heat exchange tube side of condenser is divided into 4 sections, and first paragraph tube side is 3 heat-exchanging tube bundles 4; Second segment tube side is 2 heat-exchanging tube bundles; Three, the 4th section of tube side is respectively 1 heat-exchanging tube bundle.In the housing 5 of condenser, be provided with two pieces of segmental baffles 6, form the heat exchange structure of quadritube-pass three shell side thus.Heat-exchanging tube bundle is copper pipe, every root pipe range 400mm.In the end socket of left and right two ends, second layer dividing plate respectively having 5 diameters is the liquid-leaking nozzle that 0.5 ~ 3mm does not wait.
On the end socket internal partition of left and right two ends, the aperture area sum of liquid-leaking nozzle sum is determined by the total heat exchange amount of shell-and-tube cooler.
Because the leaking liquid amount on the dividing plate of left and right is extremely important, its condensate liquid must be made above to form the stable ponding layer of one deck at porous barrier (in other words the upper surface of each liquid-leaking nozzle).This ponding layer plays the effect of a water seal, and namely liquid can pass through this aperture, and steam then enters next tube side, reaches the object of leakage resistance vapour thus.Therefore the area of (maintaining this flow) liquid-leaking nozzle to be calculated according to the total heat exchange amount of condenser, in order to the effect that can ensure that liquid-leaking nozzle has " leakage resistance vapour ", so the aperture of liquid-leaking nozzle or Line Integral are slit into several aperture.Namely the hole count of liquid-leaking nozzle, aperture sum equal total leakage (hole) area.
As embodiment: this condenser is mainly used in experimental study, under different operating condition or different thermal parameter, design leakage resistance vapour type shell-and-tube experiment condenser provides technical data.
The external diameter of the heat-exchanging tube bundle in housing is 19mm, and tube pitch is 25mm, and steam inlet pipe interior diameter is 20mm, and steam outlet pipe interior diameter is 10mm, and cooling water outlet and inlet pipe interior diameter is 20mm.Setting condenser inlet vapor (steam) temperature is 103 DEG C, and steam superheat is about 3 DEG C, and flow is 9.15kg/h, and pressure is 0.1Mp.Cooling water inlet temperature is 18 DEG C, and flow is 150kg/h, maintains parameter constant constant in experimentation.Second layer dividing plate respectively having 5 diameters in the end socket of left two ends is the liquid-leaking nozzle of 1mm; In the end socket of right two ends, second layer dividing plate respectively to have 3 diameters be 1mm and 2 diameter is the liquid-leaking nozzle of 2mm.
Because each root lime set of hull outside is drawn on pipeline all valve is housed, so the unlatching quantity of by-pass valve control, under just can obtaining different thermal parameter, the leaking liquid amount of the best or determine the leakage area of its best.If by the valve closing of all lime set skirts, be just equivalent to the structure of common tube shell tube condenser, so this device conveniently can carry out contrast experiment.
In experimentation, the heat exchange amount of this condenser is all the time higher than traditional condenser, and after 40min stablizes, difference between the two roughly maintains 200-300J.Within the identical time period, the former heat exchange amount roughly improves 60% than the latter.
Claims (7)
1. leakage resistance vapour type shell-and-tube experiment condenser, has heat-exchanging tube bundle, housing, dividing plate, deflection plate and end socket, it is characterized in that: in the left end end socket (1) of condenser, be provided with three layers of dividing plate (2); Two-layer dividing plate is provided with in right-hand member end socket, wherein the second layer dividing plate in left end end socket and the second layer dividing plate in right-hand member end socket have several liquid-leaking nozzle (3), and the liquid-leaking nozzle quantity on left and right two endplates is unequal, the aperture area sum of right-hand member dividing plate liquid-leaking nozzle sum is greater than each aperture area sum on left end dividing plate, on left and right two endplates, the below of each liquid-leaking nozzle is welded with lime set fairlead, and lime set fairlead is connected in a closed container by insulating tube through housing.
2., according to leakage resistance vapour type shell-and-tube experiment condenser according to claim 1, it is characterized in that the aperture of each liquid-leaking nozzle on the end socket internal partition of described left and right two ends is unequal.
3., according to leakage resistance vapour type shell-and-tube experiment condenser according to claim 1, it is characterized in that the heat exchange tube side of described condenser is divided into 4 sections, first paragraph tube side is 3 heat-exchanging tube bundles (4); Second segment tube side is 2 heat-exchanging tube bundles; Three, the 4th section of tube side is respectively 1 heat-exchanging tube bundle, is provided with two pieces of segmental baffles (6) in the housing (5) of condenser, forms the heat exchange structure of quadritube-pass three shell side thus.
4., according to the leakage resistance vapour type shell-and-tube experiment condenser described in claim 1 or 2, it is characterized in that drawing on pipeline in each root lime set of described hull outside all valve being housed.
5., according to leakage resistance vapour type shell-and-tube experiment condenser according to claim 1, it is characterized in that the aperture area sum of liquid-leaking nozzle sum on the end socket internal partition of described left and right two ends is determined by the total heat exchange amount of shell-and-tube cooler.
6., according to the leakage resistance vapour type shell-and-tube experiment condenser described in claim 1 or 2, it is characterized in that in the end socket of described left and right two ends, second layer dividing plate respectively having 5 diameters is the liquid-leaking nozzle that 0.5 ~ 3mm does not wait.
7., according to the leakage resistance vapour type shell-and-tube experiment condenser described in claim 1 or 3, it is characterized in that described heat-exchanging tube bundle is copper pipe, every root pipe range 400mm.
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| CN201520366905.0U CN204705216U (en) | 2015-06-01 | 2015-06-01 | Leakage resistance vapour type shell-and-tube experiment condenser |
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| CN201520366905.0U CN204705216U (en) | 2015-06-01 | 2015-06-01 | Leakage resistance vapour type shell-and-tube experiment condenser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896965A (en) * | 2015-06-01 | 2015-09-09 | 天津商业大学 | Tube-shell type experimental heat exchanger with intermediate liquid drainage function |
| CN110194977A (en) * | 2018-02-27 | 2019-09-03 | 中石化广州工程有限公司 | A kind of horizontal LNG condensing unit again |
| CN110194975A (en) * | 2018-02-27 | 2019-09-03 | 中石化广州工程有限公司 | A kind of horizontal tank body LNG after-condenser |
| CN113883916A (en) * | 2021-09-10 | 2022-01-04 | 国网河北省电力有限公司电力科学研究院 | Air cooling island minimum anti-freezing flow calculation method considering multiple influence factors |
-
2015
- 2015-06-01 CN CN201520366905.0U patent/CN204705216U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896965A (en) * | 2015-06-01 | 2015-09-09 | 天津商业大学 | Tube-shell type experimental heat exchanger with intermediate liquid drainage function |
| CN104896965B (en) * | 2015-06-01 | 2018-01-23 | 天津商业大学 | Shell-and-tube experiment heat exchanger with middle discharge opeing |
| CN110194977A (en) * | 2018-02-27 | 2019-09-03 | 中石化广州工程有限公司 | A kind of horizontal LNG condensing unit again |
| CN110194975A (en) * | 2018-02-27 | 2019-09-03 | 中石化广州工程有限公司 | A kind of horizontal tank body LNG after-condenser |
| CN110194975B (en) * | 2018-02-27 | 2021-05-04 | 中石化广州工程有限公司 | Horizontal tank LNG recondenser |
| CN113883916A (en) * | 2021-09-10 | 2022-01-04 | 国网河北省电力有限公司电力科学研究院 | Air cooling island minimum anti-freezing flow calculation method considering multiple influence factors |
| CN113883916B (en) * | 2021-09-10 | 2023-08-15 | 国网河北省电力有限公司电力科学研究院 | Air cooling island minimum antifreezing flow calculation method considering various influence factors |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151014 Termination date: 20190601 |
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| CF01 | Termination of patent right due to non-payment of annual fee |